The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2007
Filed:
Oct. 02, 2006
Michael Oechsle, Sindelfingen, DE;
Christopf Lux, Stuttgart, DE;
Michael Oechsle, Sindelfingen, DE;
Christopf Lux, Stuttgart, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a method of operating a spark ignition internal combustion engine with direct fuel injection wherein combustion air is supplied to a combustion chamber, fuel is injected into the combustion air during an intake stroke via a fuel injector in a pilot injection using a first fuel quantity so as to from a homogeneous lean air/fuel mixture in substantially the entire combustion chamber, in a main injection subsequently a second fuel quantity is injected in multiple injection steps just before ignition time so as to form a stratified rich air/fuel mixture in the area of a spark plug and the stratified fuel charge is then ignited 2° CA to 10° CA after completion of the injection of the main stratified injection.